The Tcpdump Group git mirrors - tcpdump/blob - print-atm.c

   1 /*
   2  * Copyright (c) 1994, 1995, 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21 #ifndef lint
  22 static const char rcsid[] =
  23     "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.13 2000-07-01 03:39:01 assar Exp $ (LBL)";
  24 #endif
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <sys/param.h>
  31 #include <sys/time.h>
  32 #include <sys/socket.h>
  33
  34 struct mbuf;
  35 struct rtentry;
  36 #include <net/if.h>
  37
  38 #include <netinet/in.h>
  39 #include <netinet/if_ether.h>
  40 #include <netinet/in_systm.h>
  41 #include <netinet/ip.h>
  42 #include <netinet/ip_var.h>
  43 #include <netinet/udp.h>
  44 #include <netinet/udp_var.h>
  45 #include <netinet/tcp.h>
  46
  47 #include <stdio.h>
  48 #include <pcap.h>
  49
  50 #include "interface.h"
  51 #include "addrtoname.h"
  52 #include "ethertype.h"
  53
  54 /*
  55  * This is the top level routine of the printer.  'p' is the points
  56  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  57  * 'length' is the length of the packet off the wire, and 'caplen'
  58  * is the number of bytes actually captured.
  59  */
  60 void
  61 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  62 {
  63         u_int caplen = h->caplen;
  64         u_int length = h->len;
  65         u_short ethertype;
  66
  67         ts_print(&h->ts);
  68
  69         if (caplen < 8) {
  70                 printf("[|atm]");
  71                 goto out;
  72         }
  73         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  74                 /*XXX assume 802.6 MAC header from fore driver */
  75                 if (eflag)
  76                         printf("%04x%04x %04x%04x ",
  77                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  78                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  79                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  80                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  81                 p += 20;
  82                 length -= 20;
  83                 caplen -= 20;
  84         }
  85         ethertype = p[6] << 8 | p[7];
  86         if (eflag)
  87                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  88                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  89                        p[3], p[4], p[5], /* manufacturer's code */
  90                        ethertype);
  91
  92         /*
  93          * Some printers want to get back at the ethernet addresses,
  94          * and/or check that they're not walking off the end of the packet.
  95          * Rather than pass them all the way down, we set these globals.
  96          */
  97         packetp = p;
  98         snapend = p + caplen;
  99
 100         length -= 8;
 101         caplen -= 8;
 102         p += 8;
 103
 104         switch (ethertype) {
 105
 106         case ETHERTYPE_IP:
 107                 ip_print(p, length);
 108                 break;
 109
 110 #ifdef INET6
 111         case ETHERTYPE_IPV6:
 112                 ip6_print(p, length);
 113                 break;
 114 #endif /*INET6*/
 115
 116                 /*XXX this probably isn't right */
 117         case ETHERTYPE_ARP:
 118         case ETHERTYPE_REVARP:
 119                 arp_print(p, length, caplen);
 120                 break;
 121 #ifdef notyet
 122         case ETHERTYPE_DN:
 123                 decnet_print(p, length, caplen);
 124                 break;
 125
 126         case ETHERTYPE_ATALK:
 127                 if (vflag)
 128                         fputs("et1 ", stdout);
 129                 atalk_print(p, length);
 130                 break;
 131
 132         case ETHERTYPE_AARP:
 133                 aarp_print(p, length);
 134                 break;
 135
 136         case ETHERTYPE_LAT:
 137         case ETHERTYPE_MOPRC:
 138         case ETHERTYPE_MOPDL:
 139                 /* default_print for now */
 140 #endif
 141         default:
 142                 /* ether_type not known, print raw packet */
 143                 if (!eflag)
 144                         printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
 145                                p[0], p[1], p[2], /* dsap/ssap/ctrl */
 146                                p[3], p[4], p[5], /* manufacturer's code */
 147                                ethertype);
 148                 if (!xflag && !qflag)
 149                         default_print(p, caplen);
 150         }
 151         if (xflag)
 152                 default_print(p, caplen);
 153  out:
 154         putchar('\n');
 155 }